Fla. dolphins harbor potentially deadly bacteria

One in every three bottlenose dolphin tested in the Indian River Lagoon on Florida's Atlantic coast has antibodies to a bacteria that can make them more vulnerable to other deadly infections, according to a new study.

The finding comes as researchers struggle to figure out what has caused a rash of unexplained dolphin deaths in the lagoon.

"This is just one additional level of evidence that's concerning," said Greg Bossart, a marine mammal pathologist at the Georgia Aquarium and lead author of the study. "It starts to shed light on what's happening in the lagoon."